EP 0484625 A3 19920930 - RECORDED DATA READER
Title (en)
RECORDED DATA READER
Publication
Application
Priority
JP 30165090 A 19901107
Abstract (en)
[origin: EP0484625A2] A recorded data reader is provided having a light source for emission of a beam of light to a recording medium and a photosensitive means. A polarized beam splitter incorporate an interface developed between a titanium diffused layer and a proton exchanged layer formed by treating one region of the titanium diffused layer for proton exchange, both arranged on the substrate of lithium niobate material. Also, a collimator lens, a surface wave electrode, and a grating lens are embedded in the same substrate thus forming a means for transmitting and separating beams of light. <IMAGE>
IPC 1-7
IPC 8 full level
G02B 5/30 (2006.01); G02B 27/28 (2006.01); G11B 7/12 (2006.01); G11B 7/124 (2012.01); G11B 7/135 (2006.01); G11B 7/1356 (2012.01)
CPC (source: EP US)
G11B 7/124 (2013.01 - EP US); G11B 7/1356 (2013.01 - EP US)
Citation (search report)
[A] EP 0280208 A2 19880831 - HITACHI LTD [JP]
Designated contracting state (EPC)
FR NL
DOCDB simple family (publication)
EP 0484625 A2 19920513; EP 0484625 A3 19920930; JP 3131994 B2 20010205; JP H04298831 A 19921022; US 5168489 A 19921201
DOCDB simple family (application)
EP 91109267 A 19910606; JP 30165090 A 19901107; US 71047691 A 19910605